diff --git a/.bundle/config b/.bundle/config
new file mode 100644
index 0000000..15e4c2e
--- /dev/null
+++ b/.bundle/config
@@ -0,0 +1,2 @@
+---
+BUNDLE_WITHOUT: "documentation"
diff --git a/.slather.yml b/.slather.yml
new file mode 100644
index 0000000..2a3fe89
--- /dev/null
+++ b/.slather.yml
@@ -0,0 +1,7 @@
+coverage_service: coveralls
+xcodeproj: Layout.xcodeproj
+scheme: Layout
+source_directory: Layout/*
+ignore:
+  - Layout/Expression.swift
+  - LayoutTests/*
diff --git a/.travis.yml b/.travis.yml
index 5db6246..2b1613d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,10 +1,17 @@
-language: objective-c
-osx_image: xcode8.3
-
-script: xcodebuild test -project Layout.xcodeproj -scheme Layout -destination 'platform=iOS Simulator,name=iPhone 7 Plus,OS=10.3.1'
-script: xcodebuild test -project Layout.xcodeproj -scheme LayoutTool -sdk macosx
-
-script: xcodebuild -project Layout.xcodeproj -scheme SampleApp -sdk iphonesimulator
-script: xcodebuild -project Layout.xcodeproj -scheme Sandbox -sdk iphonesimulator
-script: xcodebuild -project Layout.xcodeproj -scheme UIDesigner -sdk iphonesimulator
+language: swift
+osx_image: xcode9
 
+env:
+  - LC_CTYPE=en_US.UTF-8 LANG=en_US.UTF-8
+before_install:
+  - rvm install ruby-2.4.2
+install:
+  - bundle install --without=documentation
+script:
+  - set -o pipefail
+  - xcodebuild -project Layout.xcodeproj -scheme LayoutTool -sdk macosx test
+  - xcodebuild -project Layout.xcodeproj -scheme SampleApp -sdk iphonesimulator
+  - xcodebuild -project Layout.xcodeproj -scheme Sandbox -sdk iphonesimulator
+  - xcodebuild -project Layout.xcodeproj -scheme UIDesigner -sdk iphonesimulator
+  - xcodebuild -project Layout.xcodeproj -scheme Layout -destination 'platform=iOS Simulator,name=iPhone 8 Plus,OS=11.0' clean build test | bundle exec xcpretty
+after_success: bundle exec slather
\ No newline at end of file
diff --git a/Gemfile b/Gemfile
new file mode 100755
index 0000000..035e046
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,4 @@
+source 'https://rubygems.org'
+
+gem 'slather'
+gem 'xcpretty'
\ No newline at end of file
diff --git a/Gemfile.lock b/Gemfile.lock
new file mode 100644
index 0000000..87f154b
--- /dev/null
+++ b/Gemfile.lock
@@ -0,0 +1,47 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    CFPropertyList (2.3.5)
+    activesupport (4.2.10)
+      i18n (~> 0.7)
+      minitest (~> 5.1)
+      thread_safe (~> 0.3, >= 0.3.4)
+      tzinfo (~> 1.1)
+    claide (1.0.2)
+    clamp (0.6.5)
+    colored2 (3.1.2)
+    concurrent-ruby (1.0.5)
+    i18n (0.9.0)
+      concurrent-ruby (~> 1.0)
+    mini_portile2 (2.1.0)
+    minitest (5.10.3)
+    nanaimo (0.2.3)
+    nokogiri (1.6.8.1)
+      mini_portile2 (~> 2.1.0)
+    rouge (2.0.7)
+    slather (2.4.3)
+      CFPropertyList (~> 2.2)
+      activesupport (>= 4.0.2, < 5)
+      clamp (~> 0.6)
+      nokogiri (>= 1.6, < 1.7)
+      xcodeproj (~> 1.4)
+    thread_safe (0.3.6)
+    tzinfo (1.2.3)
+      thread_safe (~> 0.1)
+    xcodeproj (1.5.3)
+      CFPropertyList (~> 2.3.3)
+      claide (>= 1.0.2, < 2.0)
+      colored2 (~> 3.1)
+      nanaimo (~> 0.2.3)
+    xcpretty (0.2.8)
+      rouge (~> 2.0.7)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  slather
+  xcpretty
+
+BUNDLED WITH
+   1.15.4
diff --git a/Layout.xcodeproj/xcshareddata/xcschemes/Layout.xcscheme b/Layout.xcodeproj/xcshareddata/xcschemes/Layout.xcscheme
index adeb5b2..dc29bbf 100644
--- a/Layout.xcodeproj/xcshareddata/xcschemes/Layout.xcscheme
+++ b/Layout.xcodeproj/xcshareddata/xcschemes/Layout.xcscheme
@@ -27,7 +27,8 @@
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
       language = ""
-      shouldUseLaunchSchemeArgsEnv = "YES">
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      codeCoverageEnabled = "YES">
       <Testables>
          <TestableReference
             skipped = "NO">
diff --git a/Layout/RuntimeType.swift b/Layout/RuntimeType.swift
index 078d808..782549d 100644
--- a/Layout/RuntimeType.swift
+++ b/Layout/RuntimeType.swift
@@ -124,9 +124,15 @@ public class RuntimeType: NSObject {
             assertionFailure("Empty objCType")
             return nil
         }
+        print(OBJC_BOOL_IS_BOOL)
         self.availability = availability
         switch first {
-        case "c" where OBJC_BOOL_IS_BOOL == 0, "B":
+        case "B":
+            type = .any(Bool.self)
+        case "c":
+            if OBJC_BOOL_IS_BOOL == 1 {
+                fallthrough
+            }
             type = .any(Bool.self)
         case "c", "i", "s", "l", "q":
             type = .any(Int.self)
diff --git a/README.md b/README.md
index 270ecb9..95f7689 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,5 @@
 [![Travis](https://img.shields.io/travis/schibsted/layout.svg)](https://travis-ci.org/schibsted/layout)
+[![Coveralls](https://coveralls.io/repos/github/schibsted/layout/badge.svg)](https://coveralls.io/github/schibsted/layout)
 [![Platform](https://img.shields.io/cocoapods/p/Layout.svg?style=flat)](http://cocoadocs.org/docsets/Layout)
 [![Swift](https://img.shields.io/badge/swift-3.1-yellow.svg?style=flat)](https://developer.apple.com/swift)
 [![Swift](https://img.shields.io/badge/swift-3.2-orange.svg?style=flat)](https://developer.apple.com/swift)